Iron salt-antibiotic compositions and use thereof



United States Patent 9 F US. Cl. 424181 14 Claims ABSTRACT OF THE DISCLOSURE Compositions, which are mixtures of particular iron salts and particular antibiotics, are dissolved in water to form stable, compatible aqueous compositions useful as drinking waters for animals, particularly, young unweaned pigs. A typical example is a mixture of ferric ammonium citrate and neomycin sulfate in a 4:1 weight ratio plus vitamins and diluents dissolved in water.

BRIEF SUMMARY OF THE INVENTION This invention relates to stable compatible water soluble compositions which form stable, compatible aqueous compositions and more particularly to iron saltantibiotic compositions which are capable of forming stable, compatible aqueous compositions useful as drinking water for animals to protect such animals from nutritional deficiencies as well as infectious diseases and other disorders arising from nutritional deficiencies.

It is well known that domestic animals often suffer from nutritional deficiencies as Well as infectious diseases and other disorders arising from nutritional deficiencies, and that such disorders result in serious economic losses to livestock producers. For example, a relatively large portion of young domestic animals are lost prior to weaning and immediately after weaning because of poor nutrition and disorders caused by poor nutrition. Young livestock such as pigs, calves, lambs, kids, colts and the like depend on their mothers milk as the principal source of nourishment up to eight weeks after birth. It has been long recognized that nutritional anemia, infectious diseases and other secondary causes, attributable to nutrition anemia account for a high portion of the losses of young pigs prior to weaning. Sows milk contains little if any of the essential minerals such as iron, and young pigs frequently suffer from nutritional anemia. Furthermore, breast fed pigs are very susceptible to infections such as scours. The mortality rate for young pigs has been estimated to be as high as 35%. Various methods have been proposed to reduce the mortality rate of young animals such as young pigs. Generally, such methods have been directed toward supplying external sources of essential minerals particularly iron and antibiotics to correct nutritional deficiencies in the mothers milk, and to provide further protection to the young animals during the critical period prior to weaning. It has been found that young pigs are not as healthy and do not gain weight as rapidly if their nutritional deficiencies are not corrected and their infectious diseases are not curbed during the first week after farrowing and preferably within the first or second day after farrowing.

The most common method of treating young animals for nutritional deficiencies is to administer preparations containing minerals and antibiotics to the young animals within one or two days after farrowing. The preparations are usually administered orally or parenterally. Each young animal must be treated individually. Treatment involves giving each animal several doses in the form of capsules, drenches or injections. As a practical matter, individual treatment has not given satisfactory results.

3,491,187 Patented Jan. 20, 1970 Each animal must be treated several times and must be segregated from those which have not been treated the same number of times. Segregation is particularly difiicult when the livestock producer has many litters whose ages range over a relatively broad period of time. Further, there is the possibility that some of the animals might not receive the required number of doses.

In accordance with current practices, essential minerals are administered as a separate treatment in the form of capsules, drenches or other types of medication. Usually the minerals are in the form of their salts. Useful salts include the nontoxic salts of iron as well as nontoxic salts of other metals such as copper salts, zinc salts, cobalt salts, maganese salts and the like. Nontoxic iron salts are particularly useful in controlling nutritional anemia. Useful iron salts include ferrous sulfate, ferrous fumarate, ferrous lactate, ferrous calcium citrate, ferrous gluconate, soluble ferric pyrophosphate, insoluble ferric pyrophosphate, ferric ammonium citrate, iron tartrate and complex iron salts such as ferrous choline citrate or ferrous glycinate. Since iron salts have little if any compatibility with the other therapeutic agents employed in the treatment of nutritional deficiencies and infectious diseases, they are usually given in the form of a separate treatment. The preferred method of treatment is to give each young animal one or more parenteral injections of a solution of a soluble iron salt. As pointed out above, this type of treatment requires segregation of treated and untreated animals and is quite inefficient, time consuming, expensive and generally unsatisfactory. Furthermore, this method has the added disadvantage that the animals must be given separate treatments of other therapeutic agents such as antibiotics and the like with the result that each animal receives several individual treatments with two or more different medicaments. Such a regimen is unsatisfactory in that it requires handling each animal several times which is not conductive to the well being of the animal, particularly, a young or sickly animal.

In US. Patent 3,259,500Barnhart et al., July 5, 1966, it was proposed that the disadvantages of individual iron salt treatment of young animals be avoided by feeding the sow massive dosages of certain iron salts. This method has the disadvantage that feedstutfs containing iron salts must be fed to the sow for more than two Weeks prior to farrowing as well as during the lactating period. It has the added disadvantage that the iron salts must be transmitted from the mother to the young via the mothers milk. Further, there is the possibility that sickly or weak young pigs may not receive the required amounts of iron salts. Furthermore, the use of massive dosages of iron salts in the feed may make the feed unpalatable to the sow. Likewise, this treatment is not effective when the sow does not have the desire to consume the feed or refuses to eat.

Numerous attempts have been made to formulate iron salts with other therapeutic agents so that a young animal can be given a single composition as a medicament. Such compositions are described in US. Patent 2,703,285- Luther, Mar. 1, 1955, US. Patent 2,926,084Geerlings, Feb. 23, 1960 and US. Patent 2,926,085Geerlings, Feb. 23, 1960. Since iron salts have little if any compatibility with the other therapeutic agents commonly employed, satisfactory liquid compositions have been difficult to prepare and use. Consequently, the most satisfactory iron salts-antibiotic compositions to date have been solid compositions, particularly, those which can be added to feedstuffs. Although solid compositions incorporated in feedstufls may be suitable for the treatment of healthy adult animals, they are not suitable for the treatment of young animals before they are weaned or for sickly animals. Since unweaned or sickly animals are in the greatest need of treatment and are usually unable to digest solid feedstuffs, use of solid compositions in feedstuffs has not been satisfactory for the treatment of either unweaned or sickly animals. Further, in administering solid food to newborn, unweaned pigs, there is usually little or no intake of solid food until the animals reach an age of about 7 to about 10 days. Even after this period, intake of solid food by unweaned pigs is erratic and unpredictable. Consequently, most livestock producers have come to rely on parenteral injection of iron salts accompanied by supplemental treatment with other therapeutic agents such as antibiotics.

It is the object of the present invention to provide stable, compatible water soluble compositions of iron salts and antibiotics which form stable, compatible aqueous Water soluble compositions useful as drinking waters for animals as well as the resulting aqueous compositions. A further object is to provide a process employing such aqueous compositions as drinking waters for animals to protect the animals from nutritional deficiencies, infectious diseases resulting from such deficiencies and the like. Other objects will become apparent from the detailed description given hereinafter. It is intended, however, that the detailed description and specific examples do not limit the present invention but merely indicate preferred embodiments thereof since various changes and modifications within the scope of the present invention will become apparent to those skilled in the art.

The above as well as other objects of the present invention have been unexpectedly achieved in the following manner. I have discovered that stable, compatible water soluble compositions of particular water soluble iron salts and particular water soluble antibiotics can be prepared and utilized to produce stable, compatible aqueous water soluble compositions useful for drinking waters for animals, particularly young unweaned pigs, to protect these animals consuming such drinking waters from nutritional deficiencies and infectious diseases resulting from nutritional deficiencies and the like. Such compositions are in the form of finely divided solids such as powders, crystals or the like, which readily dissolve in water to produce aqueous compositions. These compositions contain weight ratios of iron salt to antibiotic of from about 1:5 to about :1. Solutions produced from these compositions remain free from oxidative deterioration, do not precipitate or react on standing and in rare cases at most only show traces of sediment formation. They are prepared using weight ratios of from about 1:80 to 112000 wherein such ratios are the ratios of the weight of the iron salt-antibiotic composition to the weight of water employed. Such compositions produce stable, compatible aqueous compositions useful as ad libitum drinking waters for animals when the weight of ratio of iron salt-antibiotic to water used is from about 1:80 to about 1:2000.

I have found that such compositions can be prepared from a water soluble iron salt, viz, ferric ammonium citrate, and a water soluble antibiotic, viz, neomycin sulfate, streptomycin sulfate, potassium pencillin or tylosin tartrate or their mixtures. Compositions can also be prepared from a water soluble iron salt, viz, ferric pyrophosphate and a water soluble antibiotic, viz, potassium pencillin or tylosin tartrate or their mixtures. When desired, additives such as water soluble vitamins, e.g., niacin, calcium pantothenate, thiamine mononitrate or the like; fat soluble vitamins, e.g., vitamins A, D, D E or the like in a soluble matrix such as gelatin, dextrin or water soluble starch; water soluble trace minerals, e.g., copper sulfate, water soluble forms of manganese sulfate and the like and water soluble diluents, e.g., sucrose, dextrose, other sugars, soluble starches (dextrins) or the like can be incorporated in the compositions provided they do not adversely affect the properties, e.g., stability and the like, of the solutions produced from the compositions. One or more of those additives can be used as desired.

Further, such compositions are readily soluble in water without need for stabilizing agents, solubilizing agents, or combinations thereof. These compositions do not contain such stabilizing agents, solubilizing agents or combinations thereof. Further, when additives are used in the compositions, such additives are chosen so that they do not function as stabilizing agents, solubilizing agents or the like for the iron salts and/ or antibiotics. Thus, these compositions are unique in that they form stable, compatible aqueous water soluble solutions without need for the aforesaid stabilizing agents, solubilizing agents, etc., whereas other common iron salt-antibiotic compositions are not water soluble, oxidize in solution, precipitate from solution or are otherwise unsuitable for use in drinking Waters for animals.

The aqueous water soluble compositions are solutions which are useful as drinking waters for drinking ad libitum by animals when prepared from the compositions disclosed in this invention and utilized in accordance with this invention. These aqueous solutions have such outstanding stabilities that the active ingredients present do not react, decompose, oxidize, precipitate or separate from solution even after the solutions have stood for extended periods of time. The remarkable stabilities of solutions prepared from these compositions make the compositions particularly useful in the preparation of ad libitum drinking waters for animals. Drinking waters prepared in accordance with this invention remain stable and unchanged for extended periods of time. Furthermore, I have found that when these compositions are prepared and used in the preparation of drinking waters, particularly for young animals, that the young animals, especially unweaned animals, consume sufiicient quantities of the dissolved compositions to obtain the required levels of iron salts and antibiotics to protect the animals from nutritional deficiencies, infectious diseases resulting from nutritional deficiencies and the like. It was unexpected that young animals would consume sufficient quantities of drinking waters containing these compositions to protect them in View of the difficulties which have been experienced in the past when attempts were made to feed young animals solid preparations or liquids such as dispersions containing iron salts and antibiotics. The present invention has the further advantage over the prior art in that supplemental treatments such as injections of iron salts, antibiotics or the like are not required.

Drinking waters prepared from these compositions; have outstanding properties such as compatibility, color and stability and are suitable for use in automatic drinking water systems for animals. Such drinking waters; show at most a slight trace of sediment after standing for extended periods of time and do not lose their efiicacy.

The appearance of traces of sediment in the drinking waters prepared in accordance with the present invention is attributable to the presence of .small amounts of insoluble impurities in the active ingredients used in the: compositions. When desired, additional drinking water can be prepared in accordance with this invention and added to the being used as drinking water without danger of reaction, precipitation, oxidation, separation or other compatibility problems. Such drinking waters can be: supplied ad libitum to the animals in Waterers or other conventional equipment normally used for supplying drinking waters to animals.

The stable, compatible water soluble compositions described above can be prepared by mixing the required quantities of iron salts and antibiotics in the form of finely divided solids at room temperature until a uniform mixture is obtained. The weight ratio of iron salt to antibiotic used in compositions is in the range of from about 1:5 to about 20:1. When desired, one or more of the additives described above can be incorporated in the composition. Since the compositions are readily soluble in water, it is not necessary to use surfactants such as stabilizing agents, solubilizing agents or the like.

Stable, compatible aqueous compositions useful as ad libitum drinking waters for animals can be prepared by mixing about one part by weight of the above composition with from about 80 parts by Weight to about 2000 parts by weight of water. Since the solid compositions are readily soluble at these concentrations, the solutions can be prepared with a minimum of agitation. The solutions can be prepared by simply shaking the composition with the required amount of water or by simple mechanical mixing, e.g., by use of a paddle or a light duty mechanical stirrer. After preparation, the appearance of the solution is determined by visual observation at O and 72 hours after preparation. The solution is examined for color change, precipitation and other changes which indicate incompatibility or reaction of the iron salts and/ or antibiotics. If the solution discolors on standing, i.e., it darkens, this indicates that oxidation of the active ingredients may have occurred. If a precipitate forms in the solution after preparation, this may also be an indication of oxidation, i.e., one or more of the active ingredients has oxidized to form an insoluble precipitate. If the solution contains a precipitate immediately after preparation, this indicates that the active ingredients are incompatible, i.e., they have reacted to form an insoluble precipitate. For a solution to be satisfactory as a drinking water for animals, it should show little if any color change initially after preparation and after standing for 72 hours at room temperature. Further, the appearance of solution should remain unchanged and the solution should not contain any form of precipitate other than a slight trace of sediment. Such a sediment is the result of traces of insoluble impurities present in the ingredients used in the formation of the composition, and is not the result of oxidation and/or reaction of the active ingredients.

For a fuller understanding of the nature and objects of this invention, reference may be made to the following examples which are given merely to illustrate the present invention and are not to be construed in a limiting sense. All weights and weight ratios given in the examples are based on the weight of the ingredients used. Unless otherwise indicated, all preparations and observations were made at room temperature, e.g., about 25 C. In the examples, the term mixture or composition refers to the mixture of iron salts and antibiotics in the form of finely divided solids and the term solution refers to the aqueous composition obtained when the mixture is dissolved in water.

EXAMPLE I The compositions shown in the table entitled Example I were prepared and evaluated in the following manner. These compositions were prepared by mixing at room temperature. The indicated quantities of ferric pyrophosphate and chlorotetracycline hydrochloride in the form of finely divided solids were mixed at room temperature to obtain uniform compositions having weight ratios of iron salts to antibiotics of 1:5, 5:1 and 20:1. The weight ratios used in the compositions were based on the weights of the active ingredients, that is, the iron salt and the antibiotic. Aqueous solutions of each of the compositions shown in the table were prepared by mixing the composition with water at the indicated weight ratios of composition to water, that is, 1:80, 1:400, 1: 1000 and 122000. Each solution was prepared by mixing the composition with water at room temperature by means of a simple mechanical stirrer. The appearance of the solution was determined by visual observation at 0 and 72 hours after preparation. The solution was examined for color, precipitation and any other change which might indicate incompatibility or reaction of the iron salts and/or antibiotics. The appearance of each solution is recorded in the table. It is to be noted that none of the solutions prepared with the compositions was a stable, compatible aqueous composition which was satisfactory for use as an animal drinking water. All of the solutions were dark in color and many contained a precipitate. Further, the solutions oxidized during standing for 72 hours at room temperature, that is, they became darker in color and the iron salt and/or antibiotic reacted to produce a precipitate or additional precipitate.

EXAMPLES II THROUGH XVIII (INCLUSIVE) The compositions shown in the tables entitled Example II through Example XVIII were prepared and evaluated in the manner described in Example I above. Appearance of solutions containing various weight ratios of the compositions to water is shown in the tables.

The compositions of Examples II, III, IV, V, VI, VII, IX, XI, XII and XIV, like Example I, were unsatisfactory for use in the preparation of stable, compatible aqueous compositions useful as animal drinking waters. These compositions were unsatisfactory because they produced highly colored solutions or solutions that precipitated, oxidized or underwent other changes which indicated incompatibility or reaction of the iron salts and/or antibiotics.

The compositions of Examples VIII, X, XIII, XV, XVI, XVII and XVIII were satisfactory for use in the preparation of stable, compatible aqueous compositions useful as animal drinking waters. These compositions produced solutions which showed little if any color change initially after preparation or after standing for 72 hours at room temperature. Further, the solutions remained un changed and did not contain any form of precipitate other than a trace of sediment after standing for 72 hours at room temperature. The slight trace of sediment was the result of the presence of small amounts of insoluble impurities in the iron salts and/or antibiotics used in the formulations and was not the result of reaction of the iron salt and/or antibiotic. In Example XVIII, several of the solutions became hazy during standing for 72 hours at room temperature. The haze was the result of impurities in the composition and not the result of reaction of the iron salt and/ or antibiotic. Further, the solutions did not show any evidence of oxidation or other forms of deterioration after standing for 72 hours at room temperature.

EXAMPLE I.FERRIC PYROPHOSPHATE-CHLOROIEI& I]$%Y;%I%NE HYDROCHLORIDE MIXTURES AND SOLUTIONS Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1 1,000 1:2,000

1;5 0 Dark brown black, very Black opaque solution; Black amber opaque solu- Light black amber, slightly opaque solution; heavy heavy precipitate; incomtion; light precipitate. opaque solution; light precipitate; incompatible. patible. precipitate.

72 Dark brown black, very Dark brown black opaque Dark black amber opaque Black amber opaque soluopaque solution; very solution; very heavy solution; heavy precipition; medium heavy preilsreavy precipitate; oxidaprecipitate; oxidation. tate; oxidation. cipitate; oxidation.

ion. 5;1 0 Black opaque solution; Black amber opaque solu- Light black amber hazy Light black amber, slightly light precipitate. tion; light precipitate. tsolution; slight precipihazy solution; no prea e. cipitate. 72 Very black opaque solution; Very black opaque solution; Black opaque solution; Light gray black opaque heavy precipitate; oxidation.

heavy precipitate; oxidation.

medium heavy precipitate; oxidation.

solution; light precipitate; oxidation.

EXAMPLE I-C0ntinned Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1 2,000

20:1 0 Very black, very opaque Very black opaque solution; Black amber, slightly Light gray amber, slightly solution; heavy precipislight precipitate. opaque solution; trace of hazy solution; no pretate; incompatible. precipitate. cipitate 72 Very black, very opaque Very black, very opaque Black opaque solution; Light gray black opaque solution; very heavy solution; heavy precipimedium heavy precipisolution; light precipiprecipitate; oxidation. tate; oxidation. tate; oxidation. pitate; oxidation.

EXAMPLE II.FERRIC AMMONIUM OITRATE-OHLORo'lrlfllERBnEooig CLlNE HYDROCHLORIDE MIXTURES AND SOLUTIONS Appearance of solutions containing the indicated Weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1;5 0 Green black opaque soln- Light green black opaque Medium green yellow, Light green yellow hazy tion; very heavy precipisolution; heavy precipislightly opaque solution; solution; light precipitate; incompatible. tate; incompatible. tmtedium heavy precipitate.

72 Very black opaque solution; Black opaque solution; very Dark green yellow opaque Gray black, slightly opaque very heavy precipitate; heavy precipitate; oxidasolution; heavy precipisolution; medium heavy oxidation. tion. tate; oxidation. precipitate; oxidation.

5 1 0 Green black opaque soln- Light green black opaque Medium green yellow, Light green yellow clear tion; heavy precipitate; solution; light precipislightly hazy solution; solution; no precipitate. incompatible. tate. very light precipitate.

72 Very black, very opaque Dark green black opaque Green black opaque solu- Gray green, very slightly solution; very heavy solution; heavy precipition; medium heavy hazy solution; light preprecipitate; oxidation. tate; oxidation. precipitate; oxidation. cipitate; oxidation.

20; 1 0 Dark green black, slightly Green black opaque solu- Medium green yellow, Light green yellow clear opaque solution; heavy tion; light precipitate. slightly hazy solution; solution; no precipitate. precipitate; incompatible. very light precipitate.

72 Very black, very opaque Very black opaque solution; Black, slightly hazy solu- Gray black, very slightly solution; very heavy heavy precipitate; oxidation; medium heavy hazy solution; light preprecipitate; oxidation. tion. precipitate; oxidation. cipitate; oxidation.

EXAMPLE III.-FE RRIC PYROPHO SPHATE-TETRACYC LINE HYD RO CHLO RIDE MIXTURES AND SOLUTIONS THE RED F Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1;5 0 Dark amber opaque solu- Red amber opaque solu- Light red amber clear solu- Light red amber clear solution; light precipitate. tion; slight precipitate. tthan; very light precipition; no precipitate.

72 Black amber, very opaque Black amber opaque solu- Black amber, slightly hazy Gray amber, slightly hazy solution; heavy precipition; medium heavy pre solution; light precipisolution; slight precipitate oxidation. cipitate; oxidation. tate; oxidation. tate; oxidation.

5;1 0 Very black, very opaque Very black opaque solution; Dark red amber clear solu- Red amber clear solution;

solutioitxtmedium heavy light precipitate. tion; no precipitate. no precipitate. precipi a e.

72 Very black, very opaque Very black, very opaque Black amber, slightly hazy Dark amber, very slightly solution; heavy precipisolution; medium heavy solution; light precipihazy solution; very light tate; oxidation. precipitate; oxidation. tate; oxidation. precipitate; oxidation.

20; 1 0 Very black, very opaque Very black opaque solu- Red amber, slightly hazy Light red amber clear solusolutio?;tmedium heavy tion; light precipitate. solution; no precipitate. tion; no precipitate. precipi a e. 72 Very black, very opaque Very black, very opaque Black amber, slightly Light black amber clear solution; heavy precipitate; oxidation.

solution; medium heavy precipitate; oxidation.

opaque solution; light precipitate; oxidation.

solution; very light precipitate; oxidation.

EXAMPLE IV.FERRIC AMMONIUM CITRATE-TETEI%JCRYDC6JILNE HYDROCHLORIDE MIXTURES AND SOLUTIONS Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1:5 0 Dark brown opaque solu- Brown yellow opaque solu- Red yellow, slightly opaque Brown, very opaque solution; heavy precipitate; tion; heavy precipitate; solution; heavy precipition; heavy precipitate; incompatible. incompatible. tate; incompatible. incompatible.

72 Brown black, very opaque Light brown black opaque Red yellow opaque solu- Brown, very opaque solusolution; very heavy pre solution; very heavy pre tion; heavy precipitate; tion; heavy precipitate; cipitate; oxidation. cipitate; oxidation. no oxidation. no oxidation.

5:1 0 Brown yellow opaque solu- Light brown yellow, Yellow amber clear solu- Dark yellow clear solution;

tion; suspended solids. slightly hazy solution; tion; no precipitate. no precipitate.

slight precipitate.

72 Brown black, very opaque Brown black opaque solu- Light brown black opaque Light brown black opaque solution; heavy precipition; medium heavy pre solution; light precipitate; solution; light precipitate; tate; oxidation. cipitate; oxidation. oxidation. oxidation.

20:1 0 Brown amber opaque solu- Brown yellow, slightly Dark yellow clear solution; Medium yellow clear solution; suspended solids. hazy solution; slight pre no precipitate. tion; no precipitate.

cipitate.

72 Dark brown black opaque Brown black, slightly Green black clear solution; Light green black clear solution; heavy precipitate; oxidation.

opaque solution; slight precipitate; oxidation.

no precipitate; oxidation.

solution; no precipitate; oxidation.

EXAMPLE V.-FERRIC PYROPHOSPHATE-OXYTETR %I%:%I]%IIE HYDROCHLORIDE MIXTURES AND SOLUTIONS Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1 :400 1:1,000 1:2,000

1:5 0 Red amber opaque solu- Red amber opaque solu- Light red amber clear solu- Light red amber clear solu tion; light precipitate. tion; slight precipitate. tion; very light precipition; no precipitate.

72 Black amber, very opaque Black amber opaque solu- Black amber, slightly hazy Gray amber, slightly hazy solution; heavy precipition; medium heavy pre solution; light precipitate; solution; slight precipitate; oxidation. cipitate; oxidation. oxidation. tate; oxidation.

5:1 0 Very black, very opaque Very black opaque solution; Dark red amber clear solu- Red amber clear solution;

solutiorti; medium heavy light precipitate. tion; no precipitate. no precipitate. precipi ate.

72 Very black very opaque Very black, very opaque Black amber, slightly hazy Dark amber, very slightly solution; heavy precipisolution; medium heavy solution; light precipitate; hazy solution; very light tate; oxidation. precipitate; oxidation. oxidation. precipitate; oxidation.

20:1 0 Very black, very opaque Very black opaque solu- Red amber, slightly hazy Light red amber clear solusolution; tmedium heavy tion; light precipitate. solution; no precipitate. tion; no precipitate. precipl a e. 72 Very black, very opaque Very black, very opaque Black amber, slightly Light black amber clear solution; heavy precipitate; oxidation.

solution; medium heavy precipitate; oxidation.

opaque solution; light precipitate; oxidation.

solution; very light precipitate; oxidation.

EXAMPLE VI.FERRIC AMMONIUM CITRATE-OXYTETRACYCLINE HYDROCHLORIDE MIXTURES AND SOLU- TIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1:5 0 Dark brown opaque solu- Brown yellow opaque solu- Red yellow, slightly opaque Brown very opaque solution; heavy precipitate; tion; heavy precipitate; solution; heavy precipition; heavy precipitate; incompatible. incompatible. tate; incompatible. incompatible.

72 Brown black, very opaque Light brown black opaque Red yellow opaque solu- Brown very opaque solusolution; very heavy pre solution; very heavy pre tion; heavy precipitate; tion; heavy precipitate; cipitate; oxidation. cipitate; oxidation. no oxidation. no oxidation.

5:1 0 Brown yellow opaque solu- Light brown yellow, Yellow amber clear solu- Dark yellow clear solution;

tion; suspended solids. slightly hazy solution; tion; no precipitate. no precipitate.

slight precipitate.

72 Brown black, very opaque Brown black opaque solu- Light brown black opaque Light brown black opaque solution; heavy pre tion; medium heavy pre solution; light precipisolution; light precipicipitate; oxidation. cipitate; oxidation. tate; oxidation. tate; oxidation.

20:1 0 Brown amber opaque solu- Brown yellow, slightly Dark yellow clear solution; Medium yellow clear solution; suspended solids. hazy solution; shght pre no precipitate. tion; no precipitate.

mm a e.

72 Dark brown black opaque Brown black, slightly Green black clear solution; Light green black clear solution; heavy preopaque solution; slight no precipitate; oxidation. solution; no precipitate; cipitate; oxidation. precipitate; oxidation. oxidation.

EXAMPLE VII.FERRIC PYROPHOSPHATE-NEOMYCIN SULFATE MIXTURES AND SOLUTIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture thereof Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1:5 0 Pale green solution; milky Very pale green solution; Pale yellow white solution; Milky white solution;

suspended floc; incommilky suspended floc; milky susgended fioc; milky suspended floc; patible. incompatible. incompati le. incompatible.

72 Pale green solution; heavy Very pale green solution; Pale yellow white solution; Milky white solution; heavy white precipitate. heavy white precipitate. heavy white precipitate. white precipitate.

511 0 Medium green solution; Light green solution; milky Pale green yellow solution; Very pale green yellow solumilky suspended floc; suspended floc; incommilky suspenedd floc; tion; milky suspended incompatible. p incompatible. floc; incompatible.

72 Medium green solution; Light green solution; heavy Pale green yellow solution; Very pale green yellow heavy white precipitate. white precipitate. heavy white precipitate. solution; heavy white precipitate.

20:1 0 Green yellow solution; very Light green yellow solu- Pale yellow solution; milky Very pale yellow solution;

milky suspended floc; tion; very milky sussuspended floc; incommilky suspended floc; incompatible. ptelnded floc; incompatpatible incompatible.

l e. 72 Green yellow solution; Light green yellow solu- Pale yellow solution; heavy Very pale yellow solution; heavy white precipitate. tion; heavy white prewhite precipitate. heavy white precipitate.

cipitate.

EXAMPLE V'III.FERRIC AMMONIUM CITRATE-NEOMYCIN SULFATE MIXTURES AND SOLUTIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture thereof Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1:5 0 Amber clear solution; no Yellow amber clear solu- Pale yellow, slightly opaque Very light amber, slightly precipitate. tion; no precipitate. solution; no precipitate. opaqute solution; no precipita e.

72 do do do Very light amber, slightly opaque solution; trace of sediment.

5:1 0 Green amber; slightly Dark yellow clear solution; Medium yellow clear solu- Light yellow clear solution;

opaqute solution; no pre no precipitate. tion; no precipitate. no precipitate. cipita e.

72 Green amber slightly Dark yellow, slightly Medium yellow, slightly Light yellow, slightly opaque solution; trace of opaque solution; trace of opaque solution; no pre opaque solution; no presediment. sediment. cipitate. cipitate.

20:1 0 Dark yellow, green solution; Dark yellow clear solution; Medium yellow clear solu- Light yellow clear solution;

no precipitate. no precipitate. tion; no precipitate. no precipitate. Green amber clear solution; --do do Light yellow, slightly trace of sediment.

opaque solution; no precipitate.

EXAMPLE IX.FERRIC PYROPHOSPHATE-STREPTOMYCIN SULFATE MIXTURES AND SOLUTIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture thereof Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1:5 0 Yellow amber clear solu- Medium yellow clear solu- Medium yellow clear solu- Light yellow clear solution;

tion; no precipitate. tion; no precipitate. tion; no precipitate. no precipitate.

72 Yellow amber, slightly Medium yellow, slightly Medium yellow, slightly Light yellow, slightly opaque solution; light opaque solution; light opaque solution; very opaque solution; slight precipitate. precipitate. light precipitate. precipitate.

5: 1 0 Green yellow clear solu- Light green yellow clear 50- Light yellow clear Pale yellow clear solution;

tion; no precipitate. lution; no precipitate. solution; no precipitate. no precipitate.

72 Green yellow, slightly Light green yellow clear Light yellow clear solution; Light yellow clear solution;

opaque solution; light solution; light precipitate. light precipitate. medium heavy precipiprecipitate. tate.

20:1 0 Green yellow clear solu- Light green yellow clear Pale yellow, slightly hazy Pale yellow, slightly hazy tion; no precipitate. solution; no precipitate. solution; no precipitate. solution; no precipitate.

72 Green yellow, slightly Light green yellow opaque Pale yellow opaque solu- Light yellow opaque soluopaque solution; light precipitate.

solution; light precipitate.

tion; slight precipitate.

tion; slight precipitate.

EXAMPLE X.-FERRIC AMMONIUM CITRATE-STREPTOMYCIN SULFATE MIXTURES AND SOLUTIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1:5 0 Dark yellow clear solution; Medium yellow clear Light yellow clear solution; Pale yellow clear solution;

no precipitate. solution; no precipitate. no precipitate. no precipitate. 72 Dark amber clear solution; Dark yellow clear solution; Medium yellow clear Do.

no precipitate. no precipitate. solution; no precipitate. 5 1 0 Dark yellow clear solution; do .do Light yellow clear solution;

no precipitate. no precipitate. 7 2 Green amber clear solution; Amber clear solution; no Medium amber clear Light amber clear solution;

no precipitate. precipitate. solution; no precipitate. no precipitate. 20;1 0 Dark yellow clear solution; Dark yellow clear solution; Medium yellow clear Pale yellow clear solution;

no precipitate. no precipitate. solution, no precipitate. no precipitate. 72 Green amber clear solution; Medium amber clear do Do.

trace of sediment. solution; no precipitate.

EXAMPLE XI.FERRIC PYROPHOSPHATE-BACITRACIN METHYLENE DISALICYLATE MIXTURES AND SOLU- TIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1 5 0 Pale amber opaque Milky amber opaque Light milky amber opaque Pale milky white, slightly solution; suspended solution; suspended solution; suspended opaque solution; slight solids. solids. solids. suspended solids.

72 Black amber opaque Black amber opaque Gray black opaque Pale gray, slightly opaque solution; medium heavy solution; medium heavy solution; light precipitate; solution; very light precipitate; oxidation. precipitate; oxidation. oxidat n. pregipitate; some ox a ion.

5; 1 0 Milky white opaque Milky white opaque Pale milky white, slightly Very pale white, slightly solution; suspended solu, on; suspended opaque solution; hazy solution; trace of solids. solids. suspended solids. suspended solids.

72 Dark black amber opaque Black amber opaque Gray black opaque Pale gray, slightly opaque solution; medium heavy solution; medium heavy solution; light precipitate; solution; light precipitate; precipitate; oxidation. precipitate; oxidation. oxidation. some oxidation.

20:1 0 Pale yellow opaque Very pale yellow, slightly Pale milky white, Slightly Water white, slightly hazy solution; suspended opaque solution; opaque solution; solution; slight suspended solids. suspended solids. suspended solids. solids.

72 Black amber opaque Gray black opaque Pale gray black, slightly Water white, slightly hazy solution; medium heavy solution; light precipitate; opaque solution; light solution; slight precipitate; precipitate; oxidation. oxidation. precipitate; oxidation. some oxidation.

EXAMPLE XII.-FERRIC AMMONIUM CITRATE-BACITRACIN METHYLENE DISALICYILATE MIXTURES AND SOLUTIONS THEREO Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 1:1,000 1:2,000

1 :5 0 Dark red purple clear Red purple clear solution; Red amber, slightly opaque Pale red amber, slightly solution; no precipitate. no precipitate. solution; no precipitate. opaquict solution; no

precip ate.

72 Dark black purple, slightly Dark red purple, slightly Dark red amber opaque Red amber, slightly opaque opaque solution; slight opaque solution; slight solution; very slight solution; slight precipitate; precipitate; oxidation. precipitate; oxidation. precipitate; oxidation. some oxidation.

5:1 0 Light green black opaque Light green black, slightly Pale green black clear Very pale green black clear solution; medium heavy opaque solution; slight solution; no precipitate. solution; no precipitate. precipitate. precipitate.

72 Dark green black, very Green black opaque Light black amber, slightly Light black amber solution; opaque solution; heavy solution; medium heavy opaque solution; slight no precipitate; some precipitate; oxidation. precipitate; oxidation. precipitate; oxidation. oxidation.

20:1 0 Green black opaque Light green black opaque Light green black, slightly Pale green black, slightly solution; slight precipitate.

Green black opaque solution; medium heavy precipitate; oxidation.

opaque solution; no precipitate.

hazy solution; no precipitate.

Gray black, slightly opaque Pale grey black, slightly solution; light precipitate; oxidation.

opaque solution; trace of precipitate; some oxidation.

EXAMPLE XIIL-FERRIC AMMONIUM CITRATE-POTASSIUM PENICILLIN MIXTURES AND SOLUTIONS THEREOF Vgeight litatio Appearance of solutions containing the indicated weight ratio of the mixture to water 0 iron sa 0 antibiotic in Hours after Weight ratio of mixture to water antiobiotiein preparation the mixture of solution 1:80 1:1000 1:2000

1:5 0 Medium yellow clear solution; no Very pale yellow clear solutionfno Water white clear solution; no pro-- precipitate. precipitate. 1 cipitate. do ..do Do. 5:1 0 Dark yellow clear solution; no we Light yellow clear solution; no pre- Pale yellow clear solution; no precip itate. gipitate. 011131138156. n n 0.

EXAMPLE XIV.IRON SALT-NEOMYCIN SULFATE MIXTURES AND SOLUTIONS THEREOF Weight ratio of iron salt to Hours after antibiotic in preparation Appearance of solutions containing 1:400 weight ratios of iron Iron Salt the mixture of solution salt-antibiotic mixtures to water Soluble iron phosphate 5:1 0 Yellow green, very opaque solution; suspended solids; in-

compatible; undissolved iron salt.

Do. Black brown, very opaque solution; suspended solids; incompatible, undissolved iron salt.

Fen-0 1s lactate 5: 1

ing salt not dissolved.

0. Dark yellow, yery opaque solution; suspended solids; incompalgible; undissolved iron salt.

72 Do. Iron ammonium sulfate 6:1 0 Pale amber milky solution; suspended solids; incompatible;

72 Iron Tartrate 5:1 0

EXAMPLE XV.FERRIC PYROPHOSPHATE-POTASSIUM PEN ICILLIN MIXTURES AND SOLUTIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 111,000 1:2,000

1;5 0 Pale yellow green clear 50- Very pale yellow clear solu- Extremely pale yellow clear Water white clear solution;

lution; no precipitate. tion; no precipitate. solutiongno precipitate. no precipitate. 72 do Very pale yellow, slightly Extremely pale yellow hazy Water white, slightly hazy hazy sgzlltlolll; no solution no precipitate. solution; no precipitate. preclpi a e. 5:1 0 Green yellow clear solu- Pale green yellow clear Very pale green yellow Extremely pale green yello w tion; no precipitate. solution; no precipitate. clear solution; no precipctletar solution; no precipa e. 1 a e. 72 do Medium green yellow clear Pale green yellow clear so- Very pale green yellow clear solution no precipitate. lution' no precipitate. solution; no precipitate. 20;1 0 .do Pale green yellow clear Very pale green yellow Extremely pale green yellow solution; no precipitate. ctlear solution; no precipclear solution; no precipi a e. ita e. 72 do Medium green yellow clear Pale green yellow clear Very pale green yellow,

solution; no precipitate. solution; no precipitate. slightly hazy solution; no

precipitate.

EXAMPLE XVL-FERRIC AMMONIUM CITRATE-ANTIBIO'IIC MIXTURES AND SOLUTIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to total Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 121,000 1:2,000

1 ;5 0 Amber, slightly hazy solu- Yellow green, slightly hazy Pale yellow, slightly hazy Very pale yellow, slightly tion; no precipitate. solution; no precipitate. solution; no precipitate. litazty solution no precip a e. 72 Amber clear solution; trace .do do D0.

of sediment. 5;1 0 Dark green yellow clear Yellow green clear solution; Pale yellow green clear so- Very pale yellow green clear solution; no precipitate. no precipitate. lution; no precipitate. solution; no precipitate. 72 ..do .d0 .d Do. 20:1 Do.

Light amber hazy solution;

no precipitate.

Equal parts of Neomycin Sulfate and Streptomycin Sulfate were used as the antibiotic.

EXAMPLE XVII.FERRIC PYROPHOSPHATE-TYLOSIN TARTRATE MIXTURES AND SOLUTIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after total antibiotic preparation in the mixture of solution Weight ratio of mixture to water 72 do do Pale green yellow clear solution; no precipitate.

Very pale green yellow clear solution; no precipitate.

Very pale green yellow,

slightly hazy solution; no precipitate.

Extremely pale green yellow or clear solution; no precipitate.

Extremely pale green yellow hazy solution; no precipitate.

Very pale green yellow Extremely pale green Virtually water white clear clear solution; no precipyellow clear solution; no solution; no precipitate. itate. precipitate.

Very pale green yellow, Extremely pale green Virtually water white hazy slightly hazy solution; no yellow, slightly hazy solution; no precipitate. precipitate. solution; no precipitate.

Very pale green yellow Extremely pale green Virtually water white clear clear solution; no precipyellow clear solution; no solution; no precipitate. itate. precipitate.

Very pale green yellow, Extremely pale green Virtually water white hazy slightly hazy solution; no precipitate.

yellow, slightly hazy solution; no precipitate.

solution; no precipitate.

EXAMPLE XVIII.FERRIC AMMONIUM CITRATE-TYLOSIN TARTBATE MIXTURES AND SOLUTIONS THEREOF Appearance of solutions containing the indicated weight ratio of the mixture to water Weight ratio of iron salt to Hours after Weight ratio of mixture to water antibiotic in preparation the mixture of solution 1:80 1:400 111,000 1:2,000

1:5 Medium green yellow clear Light green yellow clear Pale green yellow clear Very pale green yellow clear solution; no precipitate. solution; no precipitate. solution; no precipitate. solution; no precipitate.

72 ....do Light green yellow, slightly o Pale orange clear solution;

hazy solution; no no precipitate. precipitate.

:1 0 Very dark green yellow Dark green yellow clear Medium green yellow clear Light green yellow. clear clear solution; no solution; no precipitate. solution; no precipitate. solution; no precipitate.

72 i g 2 Dark green yellow, slightly Medium green yellow, Light green yellow hazy hazy solution; no slightly hazy solution; no solution; no precipitate. precipitate. precipitate.

:1 0 do Dark green yellow clear Medium green yellow clear Light green yellow clear solution; no precipitate. solution; no precipitate. solution no precipitate.

72 Very dark green yellow Dark green yellow hazy Medium green yellow hazy Light green yellow hazy hazy solution; no solution;no precipitate. solution; slight trace of solution; no precipitate. precipitate. sediment.

Examples A through H illustrate use of the iron salt- EXAMPLE D antibiotic compositions of the present invention in forrnu- Finished product (gins/1b.) lations contammg diluents, and vitamins. Dlluents such F t 60 as dextrose or the like are used in these formulations for 40 m cltra e 12 purposes of convenience of handling, that is, formulations P rep Qmycm P 3 can be measured by volume rather than by Weight so there lf 379 is less likelihood of error, waste or loss. The diluents in ex rose 1 uent the formulations act merely as diluents and do not func- 454 tion as stabilizing agents, solubilizing agents or the like. EXAMPLE E In Examples E, F, G and H, the fat soluble vitamins, i.e., vitamins A, D, and E are present in a soluble starch Finished product (gms./lb.) matnx which dextrm Ferric ammonium citrate 29,60 Neomycin sulfate 7.00 P EXAM LE A Vitamin A (325,000 IU/gm.) 2.22 Finished roduct msjlb' Vltai'i'lill D (200,000 ICU/gm.) 1.20 P (g Niacin (98% tech. grade) 6.43 Ferric amonium citrate 0 dl-calcium pantothenate 10.63 Neomycin lf t 2 Vitamin B (60 mg./lb. on sugar) 24.95 Dextrq diluent 15,) 382 V.1tam1n.E (100,000 Riboflavin (U.S.P.) 0.69 5 Menadione sodium bisulfite (63%) 0.87 EXAMPLE B Thiamine mononitrate (U.S.P.) 0.22 Copper sulfate 1.90 Finished product (gms./lb.) Preservatlv? Dextrose diluent (q.s.) 366.39

Ferric ammonium citrate 60 Streptomycin sulfate 12 454.00 Dextrose diluent (q.s.) 382 65 EXAMPLE F 1' Finished product (gms./lb.) EXAMPLE c Ferric ammonium citrate 30.00 Streptomycin sulfate 6.00 Finished product (gms./lb.) V tamin A 25,000 IU/ gm.) 1.85 Vitamin D (200,000 ICU/gm.) 1.50 Ferric ammonium citrate 60 Vitamin B (100,000 IU/lb.) 1.36 Potassium penicillin 15 Menadione sodium bisulfite (63%) 0.79 Dextrose diluent (q.s.) 22:3: 379 Dextrose diluent (q.s.) 412.50

17 EXAMPLE G Finished product (gms./lb.)

Ferric ammonium citrate 30.00 Streptomycin sulfate 6.00 Potassium penicillin 1.50 Niacin (98% tech. grade) 6.12 dl-Calcium pantothenate 9.66 Vitamin B (60 mg./lb. on sugar) 22.73 Riboflavin (U.S.P.) 0.60 Thiamine hydrochloride (U.S.P.) 0.20 Pyridoxine hydrochloride (U.S.P.) 0.20 Dextrose diluent (q.s.) 376.99

EXAMPLEH Finished product (gms./ lb.)

Ferric ammonium citrate 60.00 Neomycin sulfate 7.00 Streptomycin sulfate 7.00 Vitamin A (325,000 IU/gm.) 3.85 Vitamin D (200,000 ICU/gm.) 1.56 Vitamin B (100,000 IU/lb.) 2.27 Menadione sodium bisulfite (63%) 1.59 Niacin (98% tech. grade) 12.76 dl-Calcium pantothenate 19.32 Vitamin B (60 mg./lb. on sugar) 37.88 Riboflavin (U.S.P.) 1.25 Thiamine hydrochloride (U.S.P.) .40 Pyridoxine hydrochloride (U.S.P.) .40 Dextrose diluent (q.s.) 298.72

DIRECTIONS FOR THE USE OF THE COMPOSITIONS OF EXAMPLES A THROUGH H (I) Examples A, B, C, D and H Baby Pigs -14 Days Baby Pigs 14-28 Days Old Old Dissolve 1 oz. of finished Dissolve 1 oz. of finished product in gallon of product in 1 gallon of clean, fresh water. clean, fresh water. Supply ad libitum. Supply ad libitum. Replace solution after Replace solution after 2 hours. 72 hours.

Approximate dilution factor based on iron-antibiotic content 1:400 1:800

(II) Examples E, F and G Baby Pigs 0-14 Days Baby Pigs 14-28 Days Old Old Dissolve 2 oz. of finished Dissolve 2 oz. of product product in 5 gallon of in 1 gallon of clean, clean, fresh water. fresh water. Supply Supply ad libitum. ad libitum. Replace Replace solution after solution after 72 hours. 2 hours.

Approximate dilution factor based on iron-antibiotic content 1:400 1:800

EXAMPLE XIX This example describes an animal feeding study demonstrating the use of a drinking water containing an iron salt-antibiotic composition of the present invention and a drinking water containing a comparable composition but omitting the iron salt and the antibiotic.

(A) Preparation of the compositions (B) Preparation of the ad libitum drinking waters Formulas E and E-l were used to prepare drinking waters for ad libitum consumption by newborn, unweaned baby pigs during the feeding study described below. Drinking waters containing 2 oz. of Formula E per 0.5 gal. of water was prepared and supplied to the treated group of baby pigs for their first 14 days after birth, and drinking water containing 2 oz. of Formula E per 1.0 gal. was prepared and supplied to the treated pigs from the 15th through the 21st day after birth. Drinking waters containing the same concentration of Formula E-l were prepared and supplied to the control group of baby pigs during the same time periods. The drinking waters were supplied from 1 gal. opaque plastic creep waterers so that the baby pigs could consume the water ad libitum. The drinking waters were prepared daily during the feeding study and the quantity of drinking water consumed daily was recorded.

(C) Feeding study Both the treated and the control groups of baby pigs received the same type of food during the study. The only difference was that the treated group was supplied drinking water containing ferric ammonium citrate and neomycin sulfate and the control group was supplied with drinking water which did not contain ferric ammonium citrate and neomycin sulfate. Both groups of baby pigs were housed in pens with concrete floors and had access to the sow for nursing purposes only. Neither group received any creep rations during the study and did not have access to the sows feed or water. In other words, both groups of baby pigs were dependenLon the sows milk for their food, and the difference was in the type of drinking water which was supplied. Both groups of baby pigs were kept separate during the feeding study.

38 Duroc and crossbred Duroc baby pigs, which were the treated group of pigs, were allowed to consume their mothers milk and the drinking waters prepared from the composition designated as Formula E under the test conditions described above. 29 baby pigs of the same breeds, which were the control group of pigs, were allowed to consume their mothers milk and drinking waters prepared from the composition designated as Formula E-l above under the conditions described above.

The following tests were made during the study. The hemoglobin and hematocrit of each pig were determined at 1 day, 10 days and 21 days after birth.

The hemoglobin was determined as hemoglobin g. percent (gram percent) by the procedure described in Am. I. Clinical Pathology, June, 1953 and in Methods and Calibrations for the Spectronic 20 Bausch and Lomb Colorimeter (Rochester, New York).

The hematocrit was determined as hematocrit percent (percent of total blood) by the procedure on pages 148- of Veterinary Clinical Pathology-3 ed. (Comstock Publishing Co., Inc., Ithaca, New York 1955).

(D) Results of the feeding tests Results of the feeding study are shown in the table entited Example XIX, Summary of Feeding Study. This table shows the number of pigs supplied with drinking waters prepared from Formulas E and E-l, the hemoglobin, the standard deviations from the hemoglobin, the hematocrit, the standard deviations from the hematocrit; the cumulative mortality for both the treated and the controlled groups of pigs at 1 day, 10 days and 21 days after birth; the cumulative amount of drinking water (total cc.) consumed per pig and the cumulative amount of formula (g) consumed per pig.

The data in this table demonstrate the following. The control group of pigs, that is, those supplied with drinking water containing Formula E-l, showed a normal decline of hemoglobin in the blood from birth to the termination of the study, 21 days later. On the other hand, the treated group of baby pigs, that is, the group sup plied with drinking water containing Formula E, showed a slight increase in hemoglobin which was attributed to the presence of Formula E in the drinking water. Likewise, the control group showed a steady plateau level of hematocrit in the blood throughout the study, whereas the treated group supplied with Formula E showed a distinct rise in the level of hermatocrit as the study progressed.

Further, a statistical analysis of the individual hemoglobin values for the control and treated groups showed that the treated group supplied with the iron salt-antibiotic composition had a highly significant improvement in hemoglobin level at both and 21 days, that is, (P 0.01). Similarly, a statistical analysis of the individual hematocrit values for the control and treated groups showed a significant (P 0.05) improvement in hematocrit level for the treated group at 10 days and a highly significant (P 0.01) improvement in hematocrit level for the treated group at 21 days.

consisting of potasium penicillin and tylosin tartrate, and (C) water the weight ratio of said citrate or said pyrophosphate to said antibiotic being from about 1:5 to about 20:1, and the weight ratio of said citrate or said pyrophosphate plus said antibiotic to Water being from about 1:80 to about 122000.

5. The composition of claim 4 in which said antibiotic is neomycin sulfate.

6. The composition of claim 4 in which there is present at least one additive selected from the group consisting of a Water soluble vitamin, a fat soluble vitamin in a soluble matrix, a water soluble trace mineral and a water soluble diluent.

7. A process for controlling nutritional deficiencies in an animal which comprises supplying to said animal, ad libitum, the stable, compatible aqueous composition of claim 4.

EXAMPLE XIX.SUMMARY OF FEEDING STUDY Drinking water prepared with- Formula E-1 (Without Ferric Ammonium Formula E Citrate and Neomycin Sulfate) Days after birth 1 Day 10 Days 21 Days 1 Day 10 Days 21 Days Pigs, number 38 34 31 29 23 23 Hemoglobin (g. percent, avg)- 9. 3 10. 10. 8 9. 4 9. 1 8. 6 Std. deviations :|:0. 816 $0. 948 =|=l. 36 =|;0. 678 $0. 911 :l:1. Hematocrit (percent, avg. 26. 6 28. 31. 6 27.0 27. 5 6. 7 Std. deviations :l:2. 3:1. 56 i3. 04 i2. 76 i2. 48 5:3. 19 Cumulative mortal ity 0 O 6 6 Cumulative amount of drinking water consumed per pig (cc.) 192 1, 330 3, 652 18s 2, 294 6, 477 Cumulative amount of formula consumed per pig 1 What is claimed is:

1. A stable, compatible water soluble composition for adding to water for drinking ad libitum by an animal selected from the group consisting of:

(I) a composition consisting of;

' (A) ferric ammonium citrate, and

(B) at least one antibiotic selected from the group consisting of neomycin sulfate, streptomycin sulfate, potassium penicillin and tylosin tartrate, and

(II) a composition consisting of;

(A) ferric pyrophosphate, and

(B) at least one antibiotic selected from the group consisting of potassium penicillin and tylosin tartrate the weight ratios of said citrate or said pyrophosphate to said antibiotic being from about 1:5 to about 20:1.

2. The composition of claim 1 in which said antibiotic is neomycin sulfate.

3. The composition of claim 1 in which there is present at least one additive selected from the group consisting of a water soluble vitamin, a fat soluble vitamin in a soluble matrix, a water soluble trace mineral and a water soluble diluent.

4. A stable, compatible aqueous composition useful as an ad libitum drinking water for an animal selected from the group consisting of:

(I) a composition consisting of;

(A) ferric ammonium citrate,

(B) at least one antibiotic selected from the group consisting of neomycin sulfate, streptomycin sulfate, potassium penicillin and tylosin tartrate, and

(C) water, and

(II) a composition consisting of;

(A) ferric pyrophosphate,

(B) at least one antibiotic selected from the group 8. The process of claim 7 in which said antibiotic is neomycin sulfate.

9. The process of claim 7 in which there is present at least one additive selected from the group consisting of a water soluble vitamin, a fat soluble vitamin in a soluble matrix, a water soluble trace mineral and a water soluble diluent.

10. The process of claim 7 in which the animals are pigs.

11. The process of claim 7 wherein said water soluble diluent is sucrose. 1

12. The process of claim 7 wherein said water soluble diluent is dextrose.

13. The composition of claim 6 wherein said water soluble diluent is sucrose.

14. The composition of claim 6 wherein said water soluble diluent is dextrose.

References Cited UNITED STATES PATENTS 2,906,621 9/ 1959 Catron 424-94 3,160,565 12/1964 Duel] 424147 3,234,086 2/1966 Hartmann et al. 992 3,244,527 4/1966 Baker 992 3,250,623 5/1966 St. Clair 992. 3,259,500 7/1966 Barnhart et al. 992v 3,276,956 10/1966 Cardinal 992. 3,279,923 10/ 1966 Baver et al 992 3,395,229 7/ 1968 Feigh et al 992 FRANK CACCIAPAGLIA, JR., Primary Examiner F. E. WADDELL, Assistant Examiner US. Cl. X.R. 

